发布消费REST API Magento

我一直在努力通过REST API连接到我的Magento商店。我尝试过作为一个独立的程序从XAMPP运行连接：这是代码：

<?php
$callbackUrl = "http://healthandmed.com/oauth_admin.php";
$temporaryCredentialsRequestUrl =
"http://healthandmed.com/oauth/initiate?oauth_callback=" .
urlencode($callbackUrl);
$adminAuthorizationUrl = 'http://healthandmed.com/admin123/oauth_authorize';
$accessTokenRequestUrl = 'http://healthandmed.com/oauth/token';
$apiUrl = 'http://healthandmed.com/api/rest';
$consumerKey = 'xxxxxxxxxxx';
$consumerSecret = 'xxxxxxxxxxxxx';
session_start();
if (!isset($_GET['oauth_token']) && isset($_SESSION['state']) &&
$_SESSION['state'] == 1) {
   $_SESSION['state'] = 0;
}
try {
   $authType = ($_SESSION['state'] == 2) ? OAUTH_AUTH_TYPE_AUTHORIZATION
: OAUTH_AUTH_TYPE_URI;
   $oauthClient = new OAuth($consumerKey, $consumerSecret,
OAUTH_SIG_METHOD_HMACSHA1, $authType);
   $oauthClient->enableDebug();
   if (!isset($_GET['oauth_token']) && !$_SESSION['state']) {
       $requestToken =
$oauthClient->getRequestToken($temporaryCredentialsRequestUrl);
       $_SESSION['secret'] = $requestToken['oauth_token_secret'];
       $_SESSION['state'] = 1;
       header('Location: ' . $adminAuthorizationUrl . '?oauth_token=' . 
$requestToken['oauth_token']);
       exit;
   } else if ($_SESSION['state'] == 1) {
       $oauthClient->setToken($_GET['oauth_token'], $_SESSION['secret']);
       $accessToken =
$oauthClient->getAccessToken($accessTokenRequestUrl);
       $_SESSION['state'] = 2;
       $_SESSION['token'] = $accessToken['oauth_token'];
       $_SESSION['secret'] = $accessToken['oauth_token_secret'];
       header('Location: ' . $callbackUrl);
       exit;
   } else {
       $oauthClient->setToken($_SESSION['token'], $_SESSION['secret']);
       $resourceUrl = "$apiUrl/products";
       $oauthClient->fetch($resourceUrl);
       $productsList = json_decode($oauthClient->getLastResponse());
       echo count($productsList);
   }
} catch (OAuthException $e) {
   print_r($e);
}
    ?>

我也在Inchoo尝试过这个教程：/consuming-magento-rest-zend_oauth_consumer/

两种解决方案都让我走到了同一个地方：http://healthandmed.com/admin123/oauth_authorize
并显示以下错误消息："出现错误。您的授权请求无效。"

任何帮助都将不胜感激。